Ventilator



May 9, 1933. G. c. BREIDERT VENTILATOR Filed May 6. 1929 George fdaf,

HPatented Mayh9, 1933 l i UNITED STATES PATENT OFFICE GEORGE C. EEEIDEET, OE OAK PAEII, ILLINOIS, AssIGNOE rro ILG ELECTRIC VENTILAT-l ING ComrANY, OE CHICAGO, ILLINOIS, A coErOEArION OE LOUISIANA vEN'rILA'roE Application mea may a, i929. seriaiNo. 360,729.

This invention relates to the art of ventila' ault in the operation o ventilators of this tion, and has reference more particularly to type. vent'lators of that type wherein a positive In the-accompanying drawing Ihave illusmovement ofthe air is effected through the trated one practical form of theinvention, agency oi an electrically driven fan. `"and referring thereto More specifically, the present improve- Fig. l is a vertical section through .a buildment relates to a type of ventilator known ing wall showing my improved ventilatin as wall ventilators, which are characterized .appliance mounted in an opening thereo b the provision of a casing adapted to be with the fan and IIlOtOI' appearing in elevelitted to and occupy an opening of corretlcn;

Sponding shape and size in the external wall Fig. 2 is a vertical section at right angles of a room (such as a kitchen) to be served by t0 that 0f Fig. 1, taken on l'the line 2-2 of the ventilator, an .electrically driven fan the latter, mounted within the casing, outer and inner Flg- 3 1S e Sectlenel detail taken 0n the .15 doors or shutters respectively controlling the line 3--3 0f Fig. 2; 65

outer and inner open ends of the casing, and Fig. 4 is a sectional detail taken on the operating mechanism connecting the outer line 4'4 0f Fg- 2- hutters in Such a, manner Referring t0 the (lIiWlng, 10 designates 3L and inner doors or s that when the inner door or shutter is opened fragment 0f e bulldlng We and 11 e rectanthe outer door or shutter is correspondingly guiar Opening therein, in which is mounted I0 opened, and when the innerdoor Aor shutter a rectangular casing snugly fitting the f l is closed the outer door or shutter is corre- 0PeI11I1g Fltted ljvlthln and Secured tothe spondin'gly closed. Ventilators of this type P0P, bOttOIl and Slde Wells O the casing 12 are typically illustrated in Letters Patent to 1S e rectangular angle bei' frame' 13,. and Se- Nielsen 1,696,922, January 1,' 1929, and t0 cured to the latter yas by screws 14 is a rec- LabanauskasJ 1,607 ,541, Ndvember 16, 1926; tangular panel 15 having a fan opening and a similar ventilator not employing -a fan bounded by an Outweldly directed flange 15. is typically illustrated in Letters Patent to In the panel 15 at diagonally opposite points HeDrikSen 1,470,262, Cctober 9, 1923. are holes 16y (Fig. 3), and attached ,to the l 80 When the ventilator is in Operation, both panel with their outer ends registering with 80 doors or shut-ters are, ofcourse, open; and the holes 16 are a pair of tubular arms 1 ,f experience has shown that in the practical which, at their inner ends, are secured to or use of these ventilators, especially those integral With a ported ring or saddle 18 that which employ a motor-driven fanV which may .SUPPOItS a. fan mQtOI hOllSed Wlthm a PFO- cause 'a very Slight, vibration 0f the wall tective hood or casing 19; and fast on the ar- 85 itself and thev ceiling, particles of plaster mature shaft 20 of themotor isadirect driven and the like are sometimes jarred loose from propeller fan 21 occupying the panel opentlie wall or ceiling and fall into the hinge ing. The tbular arms 1 not only form a joint of the inner door or shutter, thereby support for the motor and fan, but also funcobstructing thefull closing movement oi the tion eS 21 00011112', device fer the IHO'GOI, OI latter, and this, through the connections to whichjpurpose the inner ends of the arms the outer door, at the same time prevents the communicate4 through ports in the ring 1 complete closing of the outer door.- This, with the interior ot the protectivemood 19,

in turn, may give rise to objectionable drafts and the upper ari'n is formed with a hole 22 of cold air when the ventilator isnot in use, (Fig. 3) located behind the peripheral por- 95 and permits rain and snow to beat into the tion of the fan. As shown in Fig. 3, they casing around the imperfectly closed outer outer end of the upper 'arm 17 is closed, `as by door. The principal object of the present a plug 23. so that the cooling air induced by invention has been to provide an improvethe Jian flows upwardly through the lower ment which will obviate the above `noted panel hole 16, the lower arm 17, the motor 0 hood, and theupper arm 17 to and through entering the switch box fronrabattery oroththe hole 22. This combined motor-supporter source of current. When the door 29 is ing and cooling feature is not claimed hereclosed, the switch arm 41 is pressed inwardly, in, but forms the subject-matter of Letters breaking the circuit; and when the door is 5 Patent 1,779,657, granted to my assignee, Ilg' opened, the arm 41 is spring-actuated out- 70' Electric Ventilating Company, October 28, wardly, closing the circuit.` This automatic 1930. l switch is also a protective device to prevent f A Attached to the under side of the top wall the motor running when the doors areclosed, of the casing 12 at the ends ofthe latter are which would overheat the motor and cause angles 24 and 25, and attached to the inner injury thereto since there is no air circula- 75 side of the bottom wall of the casing 12 at tion through the cabinet when the doors a're corresponding ends of the latter are similar closed. angles 26 and 27. Hinged at 28 to the angle One important advantage of the described 26 is an inner sheet-metal door 29 carrying construction resides in the easyremovability 15 on its upper end an ordinary spring pull o f the fan and motor for inspection or relatch 30 that cooperates with a latch catch pairs. By unhooking the chain 39 the door 31 which may` be secured to the top wall of 29 maybe lowered to fully expose the front the casing 12 or to the building wall above opening of the casing, and thenby pulling said casing, to lock the door 29 in closed posiout the switch plug 43 and removing the l '20 tion.v Pivoted at 32 to the angle 25 is a descrews which attach the arms 17 to the panel 85 '35 of the latter. The door 29 lis equipped with ofthe door and the casing guarding the joint pending outer door 33, the lower edge of 15, the motor, fan and motor-supporting which, in the closed position ofthe door, overarms may be bodily removed as a lunit laps and abuts against vthe angle 27. through the front opening. Or, where the To effect simultaneous opening movements arms 17 may be cast with or permanently and simultaneous closingvmovements of the unitedto the panel 15, by removing the screws 90 two doors, I preferably employ a simple lever 14 t sembly, including the panel, may be and link connection on each side of the fan removed.4 motor, each of said connections comprising a An additional safety feature which conlever 34 pivoted at 35 to a side wall of the stitutes the chief novel feature of my prescasing 12, and links 36 and 37, the link 36 ent improvement resides in a shield or guard 95 connecting the upper end of lever 34 with- 46 that is attached to the inner side of the thedoor 29, near the upper end of the latter, door 29 a slight distance above the hinge the link 37 connecting the lower end of the of the latter, and, when the door is open, lever k34 with the door 33 near 'the lower end overhangs the joint between the lower edge .10c a handle 38 for manually opening and closingl against articles of plaster and the like that the same. To the inner side of the door 29 might rop thereinto from the wall, and is attached a chain 39 anchored to the motor' `t us insuring the complete closing of the casing 19 and serving to limit the extent of doorwhen the device is not in use. 40 opening movement of the door 29 in an obvi- In casesv where this ventilator is installed 10" ous manner. in a wall`during the erection of the latter, the To permit the free operation oi. the levers opposite side walls of the casing are pref- 34 and links 37, the vertical edges of the panel erably equipped with a pair of thin flexible 15 are notched as shown at 15a in Fig. 2. v sheet-metal wings 47 which lie within the To render the fan motor automatic in the vertical joints between adjacent rbricks or matter of starting and stopping, I preferably blocks of the wall, and ver effectively aninclude in the circuit of the motor a switch chor the casing in place. which is automatically closed when the doors I claimj are opened to start the motor in operation, In a ventllating appliance of the character and automatically opened when thedoors are described, the combination of a wall having closedto arrest the running of the motor. an opening, a casing fitted. to said opegnng, Any adaptableform of switch for this pura fan and fan motor in said casing, a door pose may be employed, and the same is prefhinged at its lower end to said casing, and a erably controlled bythe inner door 29, when guard mounted on lthe inner side of said door the latter is employed. With the details of and having a free portion overhangingthe 1.20 the switch the present invention is not con- `hinge ,'oint between said door and casing. cerned, and in Fig. 1 I have shown a switch GEORGE C BREIDERT- box 40 mounted on the angle 26 and equipped with a switch actuating arm 41 that projects- 125 60 intothe path of the lower portion of the door 6 erating with plug 43 of the circuit lead 440i 5 the motor. 45 designates the circuit lead 29 s`ig'htly above the hinge of the latter, the arm 41 being spring-actuated outwardly. In one side of the switch 'box is a socket 42 coop- 

